Mortar for fire-bricks.



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COATING R PLASTIC.

l (ac/M UNITED STATES PATENT OFFICE.

ABRAHAM B. COX, OF CHERRY VALLEY, NEW YORK, ASSIGNOR TO GENERALREDUCTION GAS & BY-PRODUCTS COMPANY, OF NEW YORK, N. Y., A CORPO- RATIONOF DELAWARE.

MORTAR FOR FIRE-BRICKS.

No Drawing.

bricks, so that they cannot be broken apart at the joints.

A typical composition of War cement consists in 75 parts of 1a e 0 partsround fire brick and 30 par s o sodium silicate. W hen the bricks arela1d 1n cement of this composition, they adhere together very strongly,and the composition has the advantage of setting very quickly and offorming a hard and durable surface. I have found that whenheatis appliedthe silicate fluxes with the shale 2ft a fairly low temperature, butwhen fused'th fi iiientyitrifies and forms a hard, tough binder, so hardand strong, in fact,.that firebrick of the ordinary character will breakbefore the'e'fnent, so

that the bricks cannot be broken apart at the joints. Aftervitrification the material is very durable, even when exposed to hightemperatures.

Specification of Letters .Patent.

Patented Jan. 8, 1918.

Where it is desired to add more body to the material a filler, such asasbestos, can be used, and I have found that by adding 1Q parts ofailggsxos to the composition to which I have re errec above, very goodresults are obtained.

The terms and expressions which I have employed are used as terms ofdescription and not of limitation, and I have no intention, in the useof such terms and expressions, of excluding any equivalents of theingredients and composition described, but recognize that variousmodifications are possible within the scope of the invention claimed.

What I claim is:

1. A mortar for firebnicksadapted to vitrify when heated to acomparatively low temperature, said mortar being comprised of sl 7 efirebrick and sodium silicate.

2. mortar for firebricks adapted to vitrify when heated to acomparatively low temperature, said mortar being composed of shale,firebrick, sodium silicate and asbestos.

3. A mortar for firebricks comprised of 7 5 parts shale, 25 parts groundbrick and 30 parts of sodium silicate.

4. A mortar for firebricks composed of 7 5 parts shale, 25 parts groundbrick, 30 parts sodium silicate and 75 parts asbestos.

ABRAHAM B. COX.

copies of this patent may be obtained for five cents each, by addressingthe Commissioner of. Patents, Washington, D. G. 2

